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Other Investments - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Mar. 31, 2016
Jan. 31, 2017
Jun. 30, 2016
Nov. 04, 2017
Nov. 05, 2016
Nov. 01, 1997
Investment [Line Items]            
Guarantee obligations note payable principal amount       $ 5,000,000    
Distributions from joint venture - Majestic 21       $ 0 $ 1,000,005  
Majestic 21 [Member]            
Investment [Line Items]            
Amount invested in joint venture - Majestic 21           $ 250,000
Percentage of ownership interest       50.00%    
Variable Interest Entity       50.00%    
Profit and loss basis point       50/50 basis    
Guarantee obligations note payable principal amount       $ 5,000,000    
Walden Woods South LLC [Member]            
Investment [Line Items]            
Percentage of ownership interest       31.30%    
CRF III, Ltd [Member]            
Investment [Line Items]            
Percentage of ownership interest 48.50%          
Proceeds from sale of interest in partnership unit $ 3,990,000          
Basis spread on variable rate 3.00%          
Proceeds from sale in installments   $ 1,000,000 $ 500,000 $ 500,000    
Gain (Loss) on sale of interest in partnership unit         $ 3,990,000  
Sale proceeds in partnership unit description       The Company received $960,000 cash, net of $40,000 cost paid and a note receivable for $3,030,000, plus interest at 3.0%, which is payable to the Company in $500,000 installments each July 1st and January 1st, commencing January 1, 2017 through July 1, 2019.    
Cost on sale of partnership interest $ 40,000          
CRF III, Ltd [Member] | Note Receivable [Member]            
Investment [Line Items]            
Proceeds from sale of interest in partnership unit 3,030,000          
CRF III, Ltd [Member] | Cash [Member]            
Investment [Line Items]            
Proceeds from sale of interest in partnership unit $ 960,000